CVE-2026-53667: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in remix-run react-router
React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.
CVE-2026-53667: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in remix-run react-router
Description
React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.
CVSS v3.1
Score 6.9medium
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-09T20:50:36.877Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a67cc2f9c2644c7f8dbb22f
Added to database: 07/27/2026, 21:22:55 UTC
Last updated: 07/27/2026, 22:07:21 UTC
Views: 6
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